int trig = 9;
int echo = 5;


void setup() {
  // put your setup code here, to run once:
 Serial.begin(115200);
 pinMode(trig, OUTPUT);
 pinMode(echo, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(trig, LOW);
  delayMicroseconds(5);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);

  long time = pulseIn(echo, HIGH);

  float distance = (340*time)/2;
  Serial.println(distance);
  delay(1000);
}